Question

Efectueaza:

1) masa impura = 60 g
purati = 90%

masa impura=?


2) masa impura = 320 g

puritati = 45%

masa pura = ?

3) masa impuritati = 20g
masa impura = 5 g

puritate = ?

Answer 1

Răspuns:

1masa pura=mimpura x puritate/100=54g

2 masa pura=320 x 45/100= 144g

3 puritate=mp x 100/mip=5 x 100/20=25 %

Explicație: